Rotary pump with deformable rollers

Abstract

The claimed invention relates to rotary pumps. The claimed rotary pump comprises: an hollow housing having a side wall and end-face walls; a shaft rotatably positioned in the housing essentially in parallel with the side wall, the distance between the housing side wall and the shaft is variable; deformable rollers that are arranged and adapted to move, when the shaft rotates, between the housing side-wall and the shaft, while moving their deformation being maximal in the region of the minimal distance between the housing side-wall and the shaft; and sealed cavities, each of which cavities being defined by two contiguous rollers, the housing's side wall and end-face walls; the sealed cavities being adapted to communicate with the suction port as their volume increases, and communicate with the delivery port as their volume decreases. The technical result: an enhanced delivery capacity—with simultaneous decrease in dimensions and mass; an improved cost-effectiveness, extended longevity and more simple operation.

1. An assembly for a rotary pump, the assembly comprising:
 a housing that comprises a side wall having an upper end and a lower end wherein a surface of the side wall defines in part a chamber having a longitudinal axis extending between the upper end to the lower end, a cross-sectional area at the upper end and a cross-sectional area at the lower end, and wherein the cross-sectional area at the upper end exceeds the cross-sectional area at the lower end; 
 a shaft having a longitudinal axis aligned with the longitudinal axis of the chamber, wherein the shaft comprises a surface that defines annuli with respect to the surface of the side wall of the housing, and wherein, at each position along the aligned longitudinal axes, each of the annuli comprises a minimum radial distance and a maximum radial distance; and 
 deformable rollers disposed between the surface of the shaft and the surface of the side wall of the housing, each of the deformable rollers having a longitudinal axis disposed at an angle to the aligned longitudinal axes of the chamber and the shaft. 
 
     
     
       2. The assembly of  claim 1  wherein cross-sections of the chamber comprise ellipses. 
     
     
       3. The assembly of  claim 1  wherein the deformable rollers comprises truncated cones. 
     
     
       4. The assembly of  claim 1  wherein the deformable rollers comprise cylinders. 
     
     
       5. The assembly of  claim 1  wherein the shaft comprises a truncate cone. 
     
     
       6. The rotary pump of  claim 1  wherein the shaft comprises a rotatable shaft. 
     
     
       7. The assembly of  claim 1  wherein the side wall of the housing comprises a rotatable side wall. 
     
     
       8. The assembly of  claim 1  wherein the deformable rollers comprise steel rods covered by a resilient material layer. 
     
     
       9. The assembly of  claim 1  wherein adjacent pairs of the deformable rollers define cavities therebetween. 
     
     
       10. The assembly of  claim 9  wherein deformation of the deformable rollers provides for formation of seals between the surface of the shaft and the surface of the side wall for sealing of fluid in each of the cavities. 
     
     
       11. The assembly of  claim 1  wherein each of the deformable rollers comprises a resilient material reinforced by another material, wherein the other material comprises a material selected from a group consisting of glass fiber, carbon fiber and steel threads.